The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2003
Filed:
Oct. 29, 2002
Mitchell Jacobson, Fairfax, VA (US);
Willibald Serrand, Buxheim, DE;
Norman H. Sweed, Berkeley Heights, NJ (US);
Hans J. M. Weiss, Oberursel, DE;
Ingo W. Dreher, Oberursel, DE;
Udo Zentner, Griesheim, DE;
Jorg H. Schmalfeld, Bad Homburg, DE;
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
An improved process for deasphalting a residua feedstock by use of a short vapor residence time process unit comprised of a horizontal moving bed of fluidized and/or stirred hot particles. The vapor phase product stream from said process unit is passed to a soaker drum where a high boiling fraction is separated and recycled to the process unit after undergoing reactions causing molecular weight growth. This reactive recycle using the soaker drum results in substantially improved qualities of the liquid products compared with what is achieved by once-through residua deasphalting process alternatives.